During the Industrial Revolution this “Temple of Invention” was full of intricate miniature machines and gadgets.

The preamble to the U.S. Constitution written entirely from vanity license plates hangs in the Smithsonian museum.

Light bulbs, scrap wood, and tinfoil comprise this homemade throne of the gods.

A street in front of NASA's D.C. headquarters has been named in honor of the Black women who were essential to early spaceflight.

This lovely pocket park is one of the most under appreciated in D.C.

The country's oldest continually-operated mini golf course lies hidden in plain sight, eclipsed by one of D.C.'s most popular tourist attractions.

The only National Monument ever to go missing for nearly 50 years then resurface in a dump.

Spectacular views await visitors to this lake.

This unique museum cafeteria showcases the history and regional diversity of African American cuisine.

An organ located deep within a cave, whose "pipes" are the geological features of the cave itself.

Outsider art meets paleontology at this roadside reptile repository.

An eponymous directional signpost erected by the first president of the United States.

Little has changed in the way that this mill operates since the 18th-century.

A renovated schoolhouse that highlights the history of Clarke County's Black community.

This local mascot has been a presence in the area since the 1960s.

A muscular Art Deco monument represents the struggle between regulators and unbridled markets.

An extensive, if one-sided, history of U.S. law enforcement's war on drugs.

A small structure built from used railroad ties honors the short term of America's 20th president.

This monument pays tribute to the musicians responsible for creating the Sound Of Asbury Park.

A piece of telecommunications history.

This pharmacist and his patient greet visitors to the National Community Pharmacists Association.

Depending on who you ask, this controversial treehouse is either a charmingly creative child's playhouse or an illegal encroachment on public land.

This lonely waterfront memorial to the men of the Titanic was erected by the "Women of America."

The only one-room schoolhouse remaining in Talbot County, Maryland.